<% if groupMediumImage.image.nil? %>
<%= link_to(image_tag('default_group_medium.jpg', :class => 'picborder'), group_path(groupMediumImage))
%>
<% else %>
<%= link_to(image_tag(url_for_file_column(groupMediumImage, "image", "thumb"), :class => 'picborder'), group_path(groupMediumImage))
%>
<% end %>